Self-adaptive tidal volume calculation method and device and breathing machine

Abstract

The invention provides a self-adaptive tidal volume calculation method. The self-adaptive tidal volume calculation method comprises the following steps that S1, the real-time flow speed F1 and the real-time pressure P1 at the collection interval time delta t of a flow sensor at a breathing machine end are collected; S2, a real-time air leakage flow velocity F2 is calculated; and S3, the inspiration tidal volume and / or the expiration tidal volume are / is calculated, wherein Ti is the inspiration phase time, and Te is the expiration phase time. According to the self-adaptive tidal volume calculation method and the device and the breathing machine, the tidal volume of the breathing machine in the using process can be accurately calculated, and therefore the treatment effect is improved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an adaptive tidal volume calculation method, device and ventilator. Background technique [0002] At present, the working modes of the ventilator mainly include the pressure control ventilation mode and the volume control ventilation mode. The difference between the positive pressure and the inspiratory time is determined by the compliance of the respiratory system and airway resistance; the volume control ventilation mode is that the ventilator manages the ventilation with the preset ventilation volume, that is, the ventilator stops delivering air after reaching the preset volume, Rely on the elastic recoil force of the lungs and thorax to passively exhale. [0003] In the volume control ventilation mode, the parameters that usually need to be set include tidal volume, trigger sensitivity, boost time, etc. Therefore, the ventilator needs to accurately calculate the user...

AI Technical Summary

Problems solved by technology

However, when the ventilator provides bi-level pressure support, the inspiratory pressure is significantly greater than the expiratory pressure, so the air leakage through the standard outlet during the inspiratory phase is greater than the air leakage during the expiratory phase, and the higher the pressure level, the greater the inspiratory pressure. The larger the leak within a phase, the less accurate the tidal volume calculated from the leak baseline

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